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      07-26-2023, 04:36 AM   #7
emthreepa
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Drives: G80 M3 Competition xDrive
Join Date: Dec 2022
Location: Pittsburgh, PA

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You need the BDG mini cats not O2 spacers and the catless or 200 euro catted downpipes will work no CEL. I would personally not recommend paying thousands more for the GESI cats when the BDG mini cats are $50 each. Not as much sound increase with the GESI cats either.
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